This document summarizes an extension called EZCheck that helps online shoppers double check their critical information before placing orders. The extension checks user-entered information against saved account details and prompts the user to update any mismatched or outdated information, unlike autofill which automatically fills in historical data. Testers found the most important features to be saving and editing user information and checking for color matches, and they gave an overall rating of 4.2 out of 5 for importance and 3.9 out of 5 for satisfaction. Suggested improvements included adding tag management features and filling information via autofill.